A rash of unrelated, violent incidents in the past week have kept local police agencies and officials busy trying to piece together information and unravel some mysteries.

Some details were released by officials Monday, with investigation continuing today.

The unusual number of extreme occurrences in Dutchess and Ulster counties included a stabbing that left two men dead and a woman injured, a shooting in a bar that killed one man and injured a woman, a fatal fire, a fatal car accident and a mysterious death.

City of Poughkeepsie police identified two men fatally stabbed Saturday in a second-floor apartment on North Clinton Street.

Police pronounced Lamar L. Johnson of Beacon, 35, dead at the scene. The other male, Landocalrissan E. Butler, 33, who lived in the apartment, was transported to Saint Francis Hospital in the Town of Poughkeepsie, where he died later on Saturday.

A woman was also transported to a local hospital, where she was treated for a stab wound to the arm and released, police said.

Autopsies conducted Monday found Butler died from a stab wound to the heart inflicted by Johnson, city police Detective Lt. Matt Clark said. The woman's wound was also inflicted by Johnson, he said.

Although stabbed, the cause of death for Johnson is pending, Clark said. All the participants in the incident have been accounted for and there are no other suspects at large, he said.

Other violent incidents in the city include a shooting Easter Sunday, a home invasion Monday night, in which two city men were arrested and charged with robbery and burglary and a reported fight that resulted in the death of a 46-year-old city man. All three incidents remain under investigation.

Updates on the rest include:

• In the Village of New Paltz, town police Chief Joseph Snyder said the Sunday morning fatal shooting at Murphy's Restaurant and Pub was "not a random act of violence."

Ryan Gray, 29, of Poughkeepsie, died in the shooting. No arrest had been made as of Monday afternoon and the investigation was continuing, Snyder said.

Snyder said a second victim who survived is a female, 26, who remains in stable condition. She was not identified.

Snyder said this was not the act of a "shooter running around town.

"We believe that the victims and perpetrator were known to each other. This incident is a spillover from some incidents in the City of Poughkeepsie," Snyder said.

"We also know that this incident did not take place due to an overcrowded bar, filled with intoxicated people that began to fight and resulted in this shooting incident," he said. "This act just happened to take place where it did based on window of opportunity."

Police ask anyone with information to contact the New Paltz Police Detective Division at 845-255-1323. All information will be kept confidential.

• In Wappingers Falls, authorities will wait for toxicology results to help determine the cause of death for William J. Long, 54, who was found dead Saturday with burns outside a house on West Main Street after a 911 call that initially reported a structure fire.

An autopsy was completed and toxicology tests need to be done now as part of the "additional investigation," said Dr. Dennis Chute, Dutchess County medical examiner. Results are due in a couple of weeks.

Village police Officer Paolo Capparelli declined to say if there were any weapons found at the scene or if Long had any other injuries.

Authorities said they are investigating if drugs or alcohol were involved.

• State police on Monday identified Mario F. Basora, 22, of Wassaic as the motorist killed in a car crash on Route 22 in Pawling Friday morning.

Authorities responded to the scene about 5:10 a.m. and found Basora's vehicle crashed into trees along the roadway.

The accident took place on Route 22 between Kitchen Corners Road and Hurd's Corner Road, authorities said.

Police have not said what caused the crash. Basora was alone in the vehicle, police said.

• Authorities have yet to release the cause of a fatal fire at the Domino's Pizza on Route 9 on Wednesday. Killed in the fire was 19-year-old Wappingers Falls resident Adam Justiniano, a 2013 graduate of Roy C. Ketcham High School.

According to police, Justiniano and two others were inside the Domino's when the fire broke out about 5 a.m. Village police Officer Capparelli said police are still trying to determine why the individuals were inside the restaurant at that time.

The two others, who told police they were employees, were able to escape, police said.

Capparelli said it is unclear why they were unable to help Justiniano escape, but he said the smoke and fire inside the Domino's at the time as "excessive."